12031323123 has 16 divisors (see below), whose sum is σ = 16217380256. Its totient is φ = 7933178880.

The previous prime is 12031323121. The next prime is 12031323133. The reversal of 12031323123 is 32132313021.

It is not a de Polignac number, because 12031323123 - 2¹ = 12031323121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031323123.

It is not an unprimeable number, because it can be changed into a prime (12031323121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480453 + ... + 504873.

It is an arithmetic number, because the mean of its divisors is an integer number (1013586266).

Almost surely, 2^12031323123 is an apocalyptic number.

12031323123 is a deficient number, since it is larger than the sum of its proper divisors (4186057133).

12031323123 is a wasteful number, since it uses less digits than its factorization.

12031323123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26214.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12031323123 its reverse (32132313021), we get a palindrome (44163636144).

The spelling of 12031323123 in words is "twelve billion, thirty-one million, three hundred twenty-three thousand, one hundred twenty-three".